The OrcaTorch SD03 dive beacon is a compact and multifunctional 4-color dive beacon. It can emit light in 4 different colors and has 8  lighting modes: for each color either constant light or flashing mode. 

It's a great design, small and handy, and compatible with a 1*AA battery or 1*14500 battery, a very well-designed addition to any dive rig that needs visual diver location in a dark environment. 

Super Sleek design, and is easy to change underwater with 5mm gloves on. The tail D-ring can be used more easily with lanyards.

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it’s especially useful at night diving and always is good to have another backup light in case of to be running out of batteries on my other light torches. Also, I like the emergency SOS light function. Besides, it's also functional, easy to turn on and off and to change the color of the light and patterns